In the wake of the Fukishima Nuclear Reactor incident, radiation is on the minds of many people, but did you know that people are exposed to radiation everyday? Ionizing radiation, like many things, isn’t bad unless a living organism is exposed to too much of it.

The eruption of the Eyjafjallajökull volcano in Iceland created an ash cloud that disrupted air traffic throughout Europe. And as if the magma and ash violently spewing out of the volcano's crater wasn't scary enough, the eruption also generates lightning!